Which structure is not a superficial perineal pouch muscle?

Which structure is not a superficial perineal pouch muscle?

• A. Superficial transverse perineal
• B. Bulbospongiosus
• C. Ischiocavernosus
• D. Deep transverse perineal

Answer: (D)

This question tests knowledge of which muscles belong to the superficial perineal pouch versus the deep perineal pouch. The superficial perineal pouch contains the bulbospongiosus, ischiocavernosus, and the superficial transverse perineal muscle. In contrast, the deep transverse perineal muscle is located in the deep perineal pouch, which lies deep to the perineal membrane and houses deeper pelvic-floor muscles like the sphincter urethrae. Therefore, the structure that is not a superficial pouch muscle is the deep transverse perineal muscle.

This question tests knowledge of which muscles belong to the superficial perineal pouch versus the deep perineal pouch. The superficial perineal pouch contains the bulbospongiosus, ischiocavernosus, and the superficial transverse perineal muscle. In contrast, the deep transverse perineal muscle is located in the deep perineal pouch, which lies deep to the perineal membrane and houses deeper pelvic-floor muscles like the sphincter urethrae. Therefore, the structure that is not a superficial pouch muscle is the deep transverse perineal muscle.